From: swarren@wwwdotorg•org (Stephen Warren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH V2 5/5] ARM: remove #gpio-ranges-cells property
Date: Tue, 16 Jul 2013 17:30:23 -0600 [thread overview]
Message-ID: <51E5D78F.8060400@wwwdotorg.org> (raw)
In-Reply-To: <51E47F85.4050905@wwwdotorg.org>
On 07/15/2013 05:02 PM, Stephen Warren wrote:
> On 07/15/2013 01:34 PM, Rob Herring wrote:
>> On 07/15/2013 01:40 PM, Stephen Warren wrote:
>>> From: Stephen Warren <swarren@nvidia•com>
>>>
>>> This property is no longer required by the GPIO binding. Remove it.
>>
>> Won't this break compatibility with older kernel? It is one thing to
>> deprecate, but removal is another. If the relevant maintainers don't
>> care, then I guess it is fine.
>
> Yes.
>
> I had originally hoped this could sneak in late for 3.11, but I suppose
> it's too late now. vf610.dtsi is a new file in 3.11 so has no legacy to
> protect.
>
> Admittedly, the #gpio-cells property was added into the SPEAr files in 3.10.
One more thought here:
I know DT bindings are supposed to evolve so that a new kernel will
support arbitrary old DTs. I'll call that backwards-compatibility for
the DT parsing code.
However, this situation is the reverse; this patch would prevent a new
DT running on an older kernel. I'll call that forwards-compatibility.
I'm not sure if the intent is to support this or not? It's certainly the
first I explicitly thought about compatibility in this direction...
next prev parent reply other threads:[~2013-07-16 23:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-15 18:40 [PATCH V2 1/5] gpio: clean up gpio-ranges documentation Stephen Warren
2013-07-15 18:40 ` [PATCH V2 2/5] of: move documentation of of_parse_phandle_with_args Stephen Warren
2013-07-15 18:40 ` [PATCH V2 3/5] of: introduce of_parse_phandle_with_fixed_args Stephen Warren
2013-07-15 18:59 ` Sergei Shtylyov
2013-07-15 23:06 ` Stephen Warren
2013-07-15 18:40 ` [PATCH V2 4/5] gpio: implement gpio-ranges binding document fix Stephen Warren
2013-07-15 18:40 ` [PATCH V2 5/5] ARM: remove #gpio-ranges-cells property Stephen Warren
2013-07-15 19:34 ` Rob Herring
2013-07-15 23:02 ` Stephen Warren
2013-07-16 23:30 ` Stephen Warren [this message]
2013-07-17 1:50 ` Rob Herring
2013-07-17 2:58 ` Stephen Warren
2013-07-18 1:35 ` Laurent Pinchart
2013-07-22 22:31 ` [PATCH V2 1/5] gpio: clean up gpio-ranges documentation Linus Walleij
2013-07-23 16:14 ` Stephen Warren
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